1EDI2004AS View Datasheet(PDF) - Infineon Technologies
Part Name
Description
MFG CO.
'1EDI2004AS' PDF : 138 Pages View PDF
EiceDRIVERTM SIL
1EDI2004AS
Functional Description
2.4.7 Fault Notifications
The device provides two kinds of fault notification mechanisms:
• Pins NFLTA, NFLTB and NRST/RDY allow for fast error notification to the main microcontroller. All signals
are active low.
• Error bits can be read by SPI.
The activation of signal NRST/RDY is associated with Reset Events (see Chapter 2.4.10). The activation of signal
NFLTA is associated with Class A Events. The activation of signal NFLTB is associated with Class B Events. In
general the activation of signal NFLTA or NFLTB is linked to a state transition of the state machine.
Notification of Event Class A
Events Class A are defined in Chapter 2.4.5.2.1.
In case of a DESAT event (generating an Event Class A) is detected by the secondary side of the device, bit
SSTAT.FLTAS is set for the duration of the failure condition. Due to the transient nature of the DESAT
conditions, it might not be possible to observe a change of the state of bits SSTAT.FLTAS
Bit SSTAT.FLTAS is mirrored automatically to bit PSTAT2.FLTAP.
The general rule related to NFLTA activation is an Event Class A occurs that leads to a state transition (from
OPM4 to OPM3 or OPM6 to OPM5), signal NFLTA is activated. In case an Event Class A occurs that does not lead
to a state transition, NFLTA is not activated (exception: tristate events). However, the corresponding error bit
in register PER or SER is set.
Notification of Event Class B
Events Class B are defined in Chapter 2.4.5.2.1.
In case an Event Class B is detected by the secondary side of the device, bit SSTAT.FLTBS is set for the duration
of the failure condition. In case of transient events, it might not be possible to observe a change of the state of
bits SSTAT.FLTBS
Bit SSTAT.FLTBS is mirrored automatically to bit PSTAT2.FLTBP.
If an Event Class B occurs that leads to a state transition (to OPM1), signal NFLTB is activated. In case an Event
Class B occurs that does not lead to a state transition, NFLTB is not activated. However, the corresponding
error bit in register PER or SER is set.
The level issued by the device on pins NFLTA and NFLTB is given by bits PSTAT2.FLTA and PSTAT2.FLTB. The
levels read by the device at those pins is given by bits PPIN.NFLTAL and PPIN.NFLTBL.
Clearing Fault Notifications
Table 12 describes how failure notifications are cleared:
Table 12 Failure Notification Clearing
NFLTA / B signals
Primary Sticky Bits
Secondary Sticky Bits
PCTRL.CLRP set
De-assertion1)
Cleared
-
PCTRL.CLRS set 2)
-
-
Cleared
EN Invalid to Valid transition De-assertion 3)
-
-
1) Depending of the configuration of bits PCFG.CLFAM and PCFG.CLFBM, the action may not be executed in case an error
condition is being detected.
2) If the device is in OPM1, setting bit SCTRL.CLRS leads to a transition to OPM0
3) Only in OPM3 and OPM5. In other Operating Modes, no de-assertion is done.
Data Sheet
45
Rev. 2.0
2019-01-16
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